ci: split the workflow into lint/type/headless/gui/integration jobs

Reconstructs the workflow stripped during the tree copy to match the
meta-gates: separate type job, headless command over
tests/unit+tests/services, and dedicated GUI / integration jobs.
Tool versions pinned to the pre-commit revisions (ruff 0.4.4,
mypy 1.10.0) so CI and local hooks agree.

.github/workflows/ci.yml

@@ -14,12 +14,25 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
-      - run: pip install ruff mypy
+      # Pinned to the pre-commit revisions so CI and local hooks agree.
+      - run: pip install ruff==0.4.4
       - run: ruff check src tests
       - run: ruff format --check src tests
 
-  test:
-    needs: lint
+  type:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+      # Pinned to the pre-commit revision (see .pre-commit-config.yaml).
+      - run: pip install mypy==1.10.0 pydantic numpy
+      - run: pip install -e .
+      - run: mypy src/otko/core src/otko/services
+
+  test-headless:
+    needs: [lint, type]
     strategy:
       fail-fast: false
       matrix:
@@ -31,8 +44,18 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - run: pip install -e ".[dev]"
+      - run: pytest tests/unit tests/services -m "not slow"
+
+  test-gui:
+    needs: [lint, type]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
       - name: Install Linux Qt deps
-        if: runner.os == 'Linux'
         run: |
           sudo apt-get update
           sudo apt-get install -y libegl1 libxkbcommon-x11-0 libxcb-icccm4 \
@@ -40,9 +63,19 @@ jobs:
             libxcb-shape0 libxcb-sync1 libxcb-xfixes0 libxcb-xinerama0 \
             libxcb-cursor0 libdbus-1-3 libgl1 libxkbcommon0 xvfb
       - run: pip install -e ".[dev]"
-      - name: Run tests (Linux, headless)
-        if: runner.os == 'Linux'
-        run: xvfb-run -a pytest --cov --cov-report=xml -m "not slow"
-      - name: Run tests (Win/Mac)
-        if: runner.os != 'Linux'
-        run: pytest --cov --cov-report=xml -m "not slow"
+      - run: xvfb-run -a pytest tests/gui -m "not slow"
+
+  test-integration:
+    needs: [lint, type]
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+      - run: pip install -e ".[dev]"
+      - run: pytest tests/integration -m "not slow"